police say the suspect, paul ciancia, pulled out an automatic assault rifle and opened fire on t.s.a. agents, killing one of them. guns and other weapons turn up at the airport all the time. just a week before at l.a.x., t.s.a. officers seized 39 gunz at airports across country. joining us is the deputy director for the ntsb. the t.s.a. agents that, you know, screen people as they're going through the airports, make sure they're not carrying weapons aboard planes, they don't have weapons themselves, tom. is that going to change as a result of this? >> well, that probably won't change. i think there will be a reassessment because what we now know is that t.s.a. is the most visible reminder of the aftermath of 9/11. we know that aviation sector remains of interest to the bad guys, whether it's one off or whether it's coordinated terrorism. so i think the entire security regime at individual airports administered by t.s.a. and airport management, that has to be reassessed to see if there are steps we can take to improve things, whether we did as good as we could in terms of response and